Grease Fittings

MESSMAKER · Sep 17, 2012

I have a couple of fittings that are not taking grease. I plan on replacing them. What is the thread size?

SSdoxie · Sep 17, 2012

Loader or tactor zerks? Don't know the thread sizes but loader is USA built, probably SAE NPT thread while tractor is likely metric.

mrmikey · Sep 17, 2012

There are a few sizes, Zerk Fittings / Grease Fittings ....Mike

MESSMAKER · Sep 18, 2012

I know there are a lot of choices. I am trying to narrow it down. i am going to need to replace the ones pointing down on the front axle of a 225.

Gil Case · Sep 20, 2012

AS Mike said there are a few different sizes, what he left out is "on our tractor". So take them out and find out which size the ones you have are. I found Metric, NPT and SAE on my tractor and implements.

mrmikey · Sep 20, 2012

I found Metric, NPT and SAE on my tractor and implements

Yep, my Jinma had mostly 1/8"npt and a couple 1/4" unf, the backhoe had terrible 1/8"npt, my loader,a Koyker had I think 1/8npt....Mike

gkh7890 · Oct 15, 2012

They will more than likely be metric. I have a DK40SE HST and the 2 of mine under the axle will rarely take grease. The tolerance is extremely tight! Your fittings are probably okay. I believe the threading is a 1.5 spacing vs a 1. Get a thread gauge from fastenal or hardware store and check the thread spacing when you take it out. Be careful of the pressure when you take the fitting off. Hope this helps?

troutsqueezer · Oct 16, 2012

Head on down to Harbor Freight and buy the plastic bin box that has every size and angle for under ten bucks.

texasjohn · Oct 16, 2012

I've had several zerks refuse grease. This was on a FEL and there was a removable pin which was being greased by the zerk....I removed the pin just enough to see the bottom of the zerk...then was able to insert grease...drove pin back in and now the entire assembly takes grease again.

Point is, problem may be not with zerk itself but rather caked grease inside...so, if you can get to the fitting under the zerk, you may be able to resolve the problem...worth thinking about...when I simply replaced the zerk, it still wouldn't take grease...had to mess with the pin.

I have two of the HF plastic bins...one metric and one SAE...grease zerks. Yes, yours are likely metric.